I have only kept hissers for about 2 years now - mainly as pets, but they have up and bred on me, so I have a few more than the 4 I started with. I have my roaches in a 40 gallon tank, with a heat pad on the bottom outside of the glass. Inside they are on newspaper, with egg carton houses. The tank is located on the floor, under my 55 gallon tank that is filled with goldfish.
I find that when the weather is warmer, they are very active - and at night the males are prone to challenging each other for territory; while I try to set up various territories about the tank, the one directly over the heating pad is the choice spot, so they fight for that spot.
The other night I could not believe it - the nicest male, 'King' Cockroach, hissed and charged! NOT at another roach, mind you, but thru the glass at my dog - a pitbull! 
I had problems 2 years ago when I first got the hissers - nearly needed hisser rescue because the dog wanted to...play with the hissers. I had to shoo her away from accepting the King Cockroach's challenge to a duel and soon all was quiet again. I have noticed my hissers will charge on occaision when I walk past the tank. You would THINK that they would feel fear when confronted with such a large object moving by! But NO! They are bold as ever and will challenge even pitbulls for that hot spot!
Does anyone else's roaches do the same?
